Not long ago my wife started to complain that her Android phone was showing the temperature in Celsius rather than Fahrenheit on the home screen. Though she spent a lifetime working with computers, she never focused on Android at all, so it was easy to assume she had clicked on something by mistake. We fixed it briefly, but it happened again. Still, this was too minor a thing for me to focus on. But then, something strange happened on my Windows computer - a Google search turned up results for t...